- Cahir
- Cahir Guillamore
- Calaiste
- Calaiste
- Calf Island East
- Calf Island Middle
- Calf Island West
- Calf Islands
- Callaghan’s Bridge
- Callaghane Bridge
- Callanafersy
- Callaros Eighter
- Cameron
- Camira
- Cammeenavrick
- Cammoge
- Camp
- Camus Bridge
- Canalough
- Candiha
- Candroma
- Canguillia
- Canknoogheda
- Canon Island
- Canrour
- Canty
- Canuig
- Cap Island
- Capel Island
- Cappaboy Beg